I prefer the term evocation instead of invocation. Rather than invoking a supernatural entity outside the audience to intervene, I like the idea of evoking a feeling already in the minds of the audience, from whatever religious, spiritual or secular civic ethics they may already possess, toward fairness, justice, compassion or whatever the purpose is for the pep talk.

I feel that evoking feelings already present in the audience is preferable to invoking a supernatural force some members might not believe in, or may call by a different name.

By speaking to the common denominator, the human spirit, the presenter can reach ALL the audience, no matter where they are in their spiritual journey. It doesn't make anyone feel left out and doesn't make anyone feel they are lacking in spiritual ethics, by suggesting they need someone telling them what to think.

Evoking is more like reminding folks of the ethics they likely learned in kindergarten, but may have forgotten in the hubbub of daily life. Evoking is not a blurring of lines between church and state, as it's basically just secular ethics.